Table 1 Screening questionnaire used in recruitment and sampling

Are you a current smoker or a recent ex-smoker (i.e. since diagnosis)?

Smoker/Recent ex-smoker

How many cigarettes per day did you smoke over the 6 months prior to diagnosis and how soon after waking did you smoke?

Do you have at least one close family member who is either a current smoker or who stopped smoking after your diagnosis? Y/N

Does your family member live with or apart from you? W/A

Have you or your family member had any previous experience of using smoking cessation services? Patient Y/N Family member Y/N

Are you or your family members currently considering smoking cessation?

Patient Y/N Family member Y/N

Stage Diagnosis stage/Treatment stage/Follow-up

Period since diagnosis:

Age